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Author Spotlight: Advancing Therapeutics to Treat Vibriosis in Humans and Aquatic Organisms
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Author Spotlight: Advancing Therapeutics to Treat Vibriosis in Humans and Aquatic Organisms

Published on: May 31, 2024

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Therapeutic potential of otilonium bromide against Vibrio vulnificus

Yue Gong1, Young Ran Kim1

  • 1College of Pharmacy and Research Institute of Drug Development, Chonnam National University, Gwangju 61186, Republic of Korea.

Research in Microbiology
|September 19, 2022
PubMed

Insights

Otilonium bromide demonstrates potent antimicrobial activity against Vibrio vulnificus, inhibiting its growth and virulence. This drug shows promise as a new therapeutic option for treating Vibrio vulnificus infections.

Area of Science:

  • Microbiology
  • Drug Discovery

Background:

  • Emerging drug-resistant pathogens necessitate novel antimicrobial agents.
  • Vibrio vulnificus infections pose a significant public health threat.

Purpose of the Study:

  • To screen Food and Drug Administration-approved drugs for efficacy against Vibrio vulnificus.
  • To investigate the antimicrobial mechanisms of otilonium bromide against Vibrio vulnificus.

Main Methods:

  • Antimicrobial assays were used to screen a drug library.
  • Field emission transmission electron microscopy and protein expression analysis were employed.
  • Swarming motility and host cell adhesion assays were conducted.

Main Results:

  • Otilonium bromide exhibited potent antimicrobial activity and synergistic effects with antibiotics against Vibrio vulnificus.
  • It induced cell division defects, inhibited swarming motility, and reduced host cell adhesion.
  • Mechanism of action involves downregulating cAMP receptor protein, flagellin B, and TolCV1, thereby reducing RtxA1 toxin secretion and cytotoxicity.

Conclusions:

  • Otilonium bromide is a potential candidate for treating Vibrio vulnificus infections.
  • Its multifaceted inhibitory action on bacterial virulence factors warrants further investigation.
Keywords:
AdhesionAntimicrobial activityCytotoxicityOtilonium bromideVibrio vulnificuscAMP receptor protein

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